As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY SWITCH WAS IN THE ARMED POSITION. EMERGENCY FLOOR LIGHTS ELUMINATED WITH NO CAUSE. WE LEFT THEM ON AND THEY BEGAN BLINKING. WE SWITCHED THEM TO OFF AND THE EMER LT NOT ARM ELUMINATED FOR THE DURATION OF FLIGHT. REMOVED FAILED IMPACT SWITCH P/N 7212-4-000 S/N 0004. INSTALLED A NEW CUSTOMER SUPPUED SWITCH P/N 7212-4-000 S/N 0374. VISUAL AND OPERATIONAL TESTS SATISFACTORY. ALL WORK IAW EMB5500 MM:33-52-17.